Hi! I have a motherboard Asus Rampage II Gene with a PSU Corsair TX850W. My question is why i can't connect the 8pins(12V) to my motherboard (just don't fit). What i have to do??? Connect only 4 pins?? Thanks for your help.

no the 8 pin is what is need. um i hate to sound like a dick but are you sure your using the right cable. just thought it might be the pcie cable that your trying to plug in to the MB and not the right 8 pin cpu power